JP2017116144A - Pre-lining block transportation method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pre-lining block transportation method that, when transporting a pre-lining block where refractory materials are combined with each other, secures a surface for jointing to other refractory materials and prevents shifting or collapse of the refractory materials due to opening of joint.SOLUTION: A pre-lining block 1 is transported while holding and binding a lower part engagement part 7 of a lateral face of the pre-lining block 1 with an upper part engagement part (top face of the pre-lining block 1) positioned upward relative to the lower part engagement part 7 while interposing a horizontal joint 4 therebetween, by detachable binding means 6.SELECTED DRAWING: Figure 1

Description

  The present invention is used for the lining of industrial furnaces used in iron production processes such as coke ovens, heating furnaces, blast furnaces, hot blast furnaces, converters, electric furnaces, ladles, or secondary smelting furnaces. It is related with the conveyance method of the pre-lining block which combined.

  In an industrial furnace used in an iron manufacturing process, when lining a refractory such as a brick, a pre-lining block in which a plurality of refractories are joined at a mortar joint in advance is used to improve work efficiency.

  For example, in Patent Document 1, a refractory block in which a large number of refractory bricks are stacked and bonded and integrated so that the length direction of the refractory bricks is oriented in the direction of the thickness of the furnace wall is carried into the furnace. A furnace wall lining construction method for sequentially stacking in a circumferential direction and a height direction in a furnace of a molten metal furnace is disclosed. At this time, a stacking missing part of the refractory brick is provided at the lower part of the refractory block, and the refractory block is suspended by inserting a lifting tool through the gap formed by the lacking part, and the refractory block is placed in a predetermined space in the furnace wall After transporting and stacking to the stacking point, the missing part is filled with a refractory. Moreover, as a hanging tool, what used the L-shaped hook for exclusive use attached to the tip of a crane is used, By inserting this L-shaped hook in the space | gap formed by the said lacking part, a refractory block is used. The lower surface of the central part is held and lifted.

  However, in the construction method of Patent Document 1, when the refractory block is lifted and transported by the L-shaped hook, the L-shaped hook holds only the lower surface of the central portion of the refractory block. In addition, cracks may occur in the mortar joints of the refractory on both sides of the refractory block. If a crack occurs in the mortar joint, the molten steel or slag may enter the mortar joint and cause local damage if the refractory comes into contact with the molten steel or slag. May leak gas from cracks in mortar joints. Furthermore, when a big crack generate | occur | produces, a refractory may slip | deviate during use, a big crack may generate | occur | produce in a refractory block, and a refractory may peel off.

  Furthermore, in order to hold the refractory block, the surface supported by the L-shaped hook has to secure a certain area, but the refractory brick must be inserted into the missing portion of the refractory brick for this purpose. It is difficult to make the joints of refractory bricks uniform in thickness, and the work is complicated.

  Further, in Patent Document 2, a wall body to be repaired is divided into a plurality of laminated portions, and a refractory aggregate in which a plurality of bricks (refractory materials) are combined in a shape matching each laminated portion is formed outside the furnace. A repair method is disclosed in which a wall body is constructed with the above-mentioned refractory aggregate after dismantling and removing the wall body repair portion of the coke oven.

  However, when the refractory aggregate of Patent Document 2 is carried into a coke oven and constructed, its bottom surface (lower surface) must be joined via a refractory disposed below and mortar. It is impossible to hold the entire bottom when lifting. On the other hand, when the refractory aggregate is lifted by providing a hook on the side surface, for example, a plurality of small-sized refractories are combined, so the mortar joint between the refractories opens, and the refractory aggregate is It may be deformed or the refractory may fall off.

  Therefore, in Patent Document 3, as a device for carrying in and taking in such a refractory assembly into a coke oven, a crimping plate for crimping both side surfaces of the refractory assembly, and an arm for opening and closing the crimping plate, Further, there is disclosed a brick taking-in device including a pin serving as an opening / closing center of an arm and an expansion / contraction device that expands / contracts a distal end portion of an extension portion of the arm. However, when this brick taking-in apparatus is used, a large pressure is applied to both sides of the refractory aggregate, so that the refractory is displaced by the pressure and a crack may occur in the mortar joint.

JP 2007-263447 A Japanese Patent Laid-Open No. 2001-19968 Japanese Patent Laid-Open No. 2001-19969

  The problem to be solved by the present invention is to secure a surface to be joined with other refractories when transporting a pre-lining block in which refractories are combined. An object of the present invention is to provide a method for transporting a pre-lining block that can prevent collapse.

  In order to prevent the horizontal joint from being opened when the prelining block is lifted when the prelining block is transported, the present inventors hold the refractories sandwiching the horizontal joint in the vertical direction and bind them together. The idea was obtained, and it was found that this could prevent the refractory from shifting or collapsing due to the opening of joints.

That is, the present invention provides the following methods (1) to (6) for conveying the pre-lining block.
(1) A method of transporting a pre-lining block combining refractories,
In a state where the lower engaging portion on the side surface of the pre-lining block and the upper engaging portion located above the lower engaging portion with the horizontal joint interposed therebetween are sandwiched and attached by a detachable binding means. A method for transporting a pre-lining block, which transports a lining block.
(2) The lower engaging portion is a hole opened on the side surface of the prelining block, or a groove provided on the bottom surface of the prelining block and opened on the side surface of the prelining block,
The prelining block transport method according to (1), wherein the upper engaging portion is a hole opened on a side surface of the prelining block or an upper surface of the prelining block.
(3) The transport method of the pre-lining block according to (1) or (2), wherein the binding means has a turnbuckle.
(4) The transport method of the pre-lining block according to (1) or (2), wherein the bundling means has a clamp.
(5) A method for transporting a pre-lining block combining refractories,
The prelining in a state where the concave portion provided at the lower end portion of the through-hole penetrating the inside of the pre-lining block and the upper surface of the pre-lining block are sandwiched and bound by the detachable binding means penetrating the through-hole. A method for conveying a pre-lining block, which conveys a block.
(6) Before transporting the pre-lining block, an organic coating layer is formed so as to include joints on the surface of the pre-lining block. The pre-lining block according to any one of (1) to (5) Transport method.

  According to the present invention, when transporting a pre-lining block in which refractories are combined, the refractories constituting the pre-lining block are vertically sandwiched and bound by the binding means. Opening of joints is prevented, and displacement and collapse of refractories are also prevented.

  In addition, according to the present invention, a sufficient surface can be secured between the bottom surface of the transported pre-lining block and the refractory underneath, and the bundling means is detachable, so that the pre-lining block is fixed. It can be removed after transport to the position. For this reason, there is no worry of gas leaks due to poor joints with the refractory below, and the construction work becomes very simple.

1 is a perspective view showing a first embodiment of the present invention. It is a perspective view which shows 2nd Example of this invention. It is a perspective view which shows 3rd Example of this invention. It is a front view which shows the binding means used in 3rd Example. It is explanatory drawing which shows notionally the bottom face of 3rd Example.

  Embodiments of the present invention will be described below based on examples shown in the drawings.

(First embodiment)
FIG. 1 is a perspective view showing a first embodiment of the present invention. The pre-lining block 1 shown in FIG. 1 has a shape in which a combustion chamber of a coke oven is divided into a height direction and a furnace length direction, and is divided into substantially rectangular parallelepipeds that are long in the furnace length direction. Ten pieces are used per step, and four steps are arranged in the height direction and combined. In addition, the pre-lining block 1 can be lifted and conveyed by hooking a hanging tool by the four rings 3 provided on the upper surface. This ring 3 has a metal plate (not shown) as a substrate, and this metal plate is attached to the upper surface of the pre-lining block 1 with an organic adhesive, so that the metal plate is burner after construction. You can easily remove it by hitting it.

For joints with two silica bricks (horizontal joint 4 and vertical joint 5), a mortar made of a meteorite material with a bonding strength of sodium silicate of 0.9 MPa is used so that the joint thickness becomes an average of 4 mm. Yes. In addition, in the pre-lining block 1 of FIG. 1, the silica brick 2 is arrange | positioned so that the vertical joint 5 may not continue. Each stage of the pre-lining block 1 has a long side of 1192 mm, a short side of 886 mm, a height of 120 mm, and an overall weight of about 336 kg. As the silica brick 2, one having a bulk specific gravity of 1.87, an apparent porosity of 18.5, and an SiO ₂ content of 95.5% by mass was used.

  The prelining block 1 is provided with turnbuckles 6 as bundling means in a total of 6 places on one side of the long side and 3 places on one side of the short side and a total of 2 places on the short side. The turnbuckle 6 is L-shaped at both upper and lower ends as locking portions, and a lower end (lower locking portion) is formed in a hole 7 opened on the side surface of the lowermost silica brick 2 as a lower engaging portion. The uppermost part (upper locking part) is inserted into contact with the upper surface of the uppermost silica brick 2 as the upper engaging part. The quartz brick 2 sandwiched between the turnbuckles 6 is bound (fixed) so as not to be detached by tightening with the turnbuckles 6.

  In this way, the prelining block 1 is conveyed in a state of being bound by the turnbuckle 6. If it does so, even if it lifts with a crane for conveyance, opening of a joint (the horizontal joint 4 and the vertical joint 5) will be prevented by the turnbuckle 6, and the shift and collapse of the silica brick 2 will be prevented.

  After the pre-lining block 1 is transported into the furnace and installed at an appropriate location, the turnbuckle 6 is removed and the hole 7 is filled with a refractory.

  In this embodiment, since the silica brick 2 is arranged so that the vertical joints 5 do not continue as described above, and the mortar has an adhesive force, the turnbuckle 6 so that all the silica bricks 2 are sandwiched between them. It is not necessary to provide the device, and it can be provided at a key portion.

(Second embodiment)
FIG. 2 is a perspective view showing a second embodiment of the present invention. This second embodiment is a modification of the first embodiment shown in FIG. 1, and is provided with a groove 8 that opens on the bottom surface of the bottom silica brick 2 instead of a hole as a lower engaging portion, and serves as a binding means. The clamps 9 are attached to a total of six places at three locations on one side on the long side surface, and the turnbuckles 6 are attached to a total of two locations at one location on the short side surface. Since the other configuration is the same as that of the first embodiment shown in FIG. 1, the same components as those in FIG. 1 are denoted by the same reference numerals in FIG.

  Similarly to the first embodiment, the second embodiment also prevents the joint (horizontal joint 4 and vertical joint 5) from being opened by the turnbuckle 6 and the clamp 9 as the bundling means. Is prevented.

  After the pre-lining block 1 is transported into the furnace and installed at an appropriate location, the turnbuckle 6 and the clamp 9 are removed and the groove 8 is filled with a refractory from the side.

  Here, as in the first embodiment and the second embodiment, by providing a lower engagement portion (hole 7 or groove 8) on the side surface of the prelining block 1, the bottom surface is lifted when the prelining block 1 is lifted. Since it does not need to be held, this bottom surface can be easily joined to other refractories, and the lowermost part of the silica brick is bound to the lowermost part (turn buckle 6 or clamp 9) (lower locking) Part) can be engaged, and when it is lifted, the upper and lower silica bricks can prevent the joints of 2 joints from opening and collapsing.

  Further, the upper engaging portion of the pre-lining block is provided above the lower engaging portion with the horizontal joint 4 interposed therebetween, thereby applying a binding force to the horizontal joint 4 so that the joint of the silica brick 2 is opened or collapsed. Can be prevented.

  In addition, the lower engagement part is a hole provided on the side surface or a groove provided on the bottom surface and opened on the side surface, and the upper engagement part is a hole or upper surface opened on the side surface. Since it does not protrude, it can be smoothly joined with other refractories. Since these holes and grooves are provided for inserting the locking portions (upper locking portion and lower locking portion) of the bundling means, the sizes thereof can be determined according to the locking portions of the bundling means. .

(Third embodiment)
FIG. 3a is a perspective view showing a third embodiment of the present invention. 3b is a front view showing the bundling means used in the third embodiment, and FIG. 3c is an explanatory view conceptually showing the bottom surface of the third embodiment. In FIG. 3a, the same components as those in the first embodiment (FIG. 1) are denoted by the same reference numerals, and the description thereof is omitted.

  In the third embodiment, through holes 10 having a rectangular cross section penetrating the pre-lining block 1 in the vertical direction are provided at a total of 8 locations, and rods 11 having tip portions 11a having L-shapes as binding means in the respective through holes 10. Is inserted, and the upper portion of the rod 11 is tightened with a nut 11b. The distal end portion 11a of the rod 11 may be an inverted T shape.

  As conceptually shown in FIG. 3 c, the periphery of the bottom through hole of the bottom silica brick 2 having the through hole 10 is a circular recess 10 a including the through hole, and the bottom of the recess 10 a is flat. It has become. When the rod 11 inserted into the through hole 10 is rotated, the tip end portion 11a is L-shaped or inverted T-shaped, so that the tip end portion 11a rotates and engages with the recess 10a. And if the nut 11b of an upper end is rotated, the silica brick 2 between these will be united (fixed).

  Therefore, also in the third embodiment, as in the first and second embodiments, the joint 11 (horizontal joint 4 and vertical joint 5) is prevented from opening by the rod 11 as the binding means, and the silica brick is displaced by two. And collapse are also prevented.

  Further, in the third embodiment, since the pre-lining block 1 is provided with a relatively small through hole 10 in the vertical direction, there is less damage to the joint compared to the first and second embodiments, and a gas leak from the joint etc. The risk of this is further reduced. The through-hole 10 can be provided in the metal frame when the brick for the silica brick 2 is formed, and may be bored after the brick is fired, or may be bored after the pre-lining block 1 is formed. The recess 10 a at the lower end of the through hole 10 can also be provided in the same manner as the through hole 10. At this time, the size of the recess 10a is set to a size that accommodates the lower locking portion (the tip portion 11a of the rod 11) of the coupling means. Thereby, since the lower latching | locking part (front-end | tip part 11a of the rod 11) of a coupling means does not protrude in the bottom face of the prelining block 1, joining with a lower refractory can be performed without a problem.

  After the pre-lining block 1 is transported into the furnace and installed at an appropriate location, the rod 11 is removed and the through hole 10 is filled with a refractory.

(Fourth embodiment)
In the fourth example, in the pre-lining block shown in the third example, a total of four surfaces of both long side surfaces and both short side surfaces were coated with polyurea resin to form a coating layer. Specifically, LINE-X (tensile strength: 23 MPa, elongation rate: 160%) of Japan Homeland Security Co., Ltd. was used as the polyurea resin, and this was sprayed to form a coating layer having a thickness of about 1 mm.

  In the present invention, as in the fourth embodiment, an organic coating layer can be formed on the joint portion in order to further reinforce the joint strength of the pre-lining block. Since the organic coating layer is decomposed by heating, the performance of the pre-lining block is not adversely affected during use.

  This coating layer can be formed on a surface including joints at arbitrary sites according to the stress generated in the joints. That is, a coating layer may be formed on a part of the surface, or may be formed on the entire surface. In addition, the joint as used in the field of the present invention includes not only the mortar joint using the mortar described above but also an empty joint using no mortar.

  In the present invention, the coating layer is preferably formed of a polyurea resin or a polyurethane-urea composite resin. A polyurea resin or a polyurethane-urea composite resin is characterized by a very high tensile strength compared to other coating resins. For this reason, even if the coating thickness is thin or the coating area is small as compared with other coating resins, it can sufficiently cope with the tensile stress generated in the joint when the pre-lining block is conveyed. In addition, the polyurea resin or the polyurethane-urea composite resin can be applied by spray, and since it hardens immediately and develops strength, the joint of the pre-lining block can be quickly coated, and the work efficiency is excellent.

  In the present invention, the organic coating layer formed so as to include joints on the surface of the pre-lining block is preferably formed of a polyurea resin or a polyurethane-urea composite resin as described above, but is not limited thereto. An acrylic resin, an epoxy resin, a urethane resin, etc. can also be used.

  As the polyurea resin or the polyurethane-urea composite resin that can be suitably used in the present invention, those generally available on the market for coating the surface of the structure can be used. Further, when a high strength is required for the joint depending on the use conditions, a material having a tensile strength of 15 MPa or more can be used. As the polyurea resin or polyurethane-urea composite resin satisfying such tensile strength conditions, those commercially available as a coating material can be used. For example, as a polyurea resin, LINE-X of Japan Homeland Security Co., Ltd. Can be used, such as spray coating by Stella Cube Co., Ltd., Foslock New Coat Co., Ltd., brushing by SENPLETHANE Co., Ltd.

  Although the embodiments of the present invention have been described above, the bundling means used in the present invention is between the upper engaging portion and the lower engaging portion (the first embodiment and the second embodiment) or the upper end of the through hole. It attaches to a prelining block before conveyance in order to apply a binding force to the joint between the part and the lower end (third embodiment and fourth embodiment). On the other hand, the bundling means can be attached to and detached from the pre-lining block, so that it is not obstructed to join with other refractories after it is removed after conveyance. The position and number of the bundling means can be appropriately determined according to the shape and size of the pre-lining block, the size and shape of the refractory to be used, and the adhesive strength of the mortar to be used.

  As the main body of the bundling means, a cotter, rubber, spring, hydraulic cylinder, air cylinder, etc. can be used in addition to the turnbuckle, clamp and rod shown in the embodiments.

  As the locking portion of the bundling means, a protrusion for detachably engaging with the inner surface of the through hole or groove and the upper surface of the pre-lining block can be used. For example, as in the first embodiment, both ends are L-shaped as locking portions, so that the pre-lining block can be engaged with a simple operation.

  Arbitrary things can be used for parts other than the main-body part of a binding means, for example, the part which connects a main-body part and a latching | locking part, for example, a board, a rod, a rope, a string, a sheet | seat etc. may be used and a material is also metal Organic materials can also be used.

  The present invention also provides a pre-lining block that is an aggregate of refractories in which a plurality of refractories are combined with each other without using mortar, or a plurality of refractories are joined together using mortar. It can be applied to any pre-lining block which is an aggregate of refractories combined together. And what is generally used for the industrial furnace used by the manufacturing process of iron can be used as a refractory material which comprises a prelining block. For example, non-fired brick, fired brick, or precast block. There is no restriction | limiting also in the mortar which joins these refractories, A general mortar can be used. Moreover, there is no restriction | limiting in particular also about the magnitude | size and shape of a prelining block.

1 Pre-lining block 2 Silica brick (refractory)
3 Ring 4 Horizontal joint 5 Vertical joint 6 Turnbuckle (Bundling means)
7 holes (lower engaging part)
8 groove (lower engagement part)
9 Clamp (Bundling means)
10 through hole 10a recess 11 rod (binding means)
11a Tip (bottom locking part)
11b Nut (upper locking part)

Claims (6)

A method of transporting a pre-lining block that combines refractories,
In a state where the lower engaging portion on the side surface of the pre-lining block and the upper engaging portion located above the lower engaging portion with the horizontal joint interposed therebetween are sandwiched and attached by a detachable binding means. A method for transporting a pre-lining block, which transports a lining block. The lower engaging portion is a hole that opens in the side surface of the pre-lining block, or a groove that is provided in the bottom surface of the pre-lining block and opens in the side surface of the pre-lining block,
The method for transporting a prelining block according to claim 1, wherein the upper engaging portion is a hole opened on a side surface of the prelining block or an upper surface of the prelining block.   The conveying method of the prelining block of Claim 1 or Claim 2 with which a binding means has a turnbuckle.   The transport method of a pre-lining block according to claim 1 or 2, wherein the binding means has a clamp. A method of transporting a pre-lining block that combines refractories,
The prelining in a state where the concave portion provided at the lower end portion of the through-hole penetrating the inside of the pre-lining block and the upper surface of the pre-lining block are sandwiched and bound by the detachable binding means penetrating the through-hole. A method for conveying a pre-lining block, which conveys a block.   The method for transporting a prelining block according to any one of claims 1 to 5, wherein an organic coating layer is formed so as to include joints on a surface of the prelining block before the prelining block is transported.

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